Grinding-machine.



No. 810,426. PATENTED JAN. 23, 1906. R. L. MORGAN & J. N. HEALD.

GRINDING MACHINE.

APPLIGATION FILED MAY 14, 1904.

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RALPH L. MORGAN AND JAMES N. HEALD, OF WORCESTER, MASSACHU SETTS, ASSIGNORS To THE HEALD MACHINE COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION or MASSAOHUSET'IS.

GRINIQING-MACHINE'.

Be it .known that we, RALPH LL MORGAN and JAMES N. HEALD, citizens of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in .Grindin -Machines, of which the following is a spec cation, accompanied by drawings forming a part of the same, in which v Fi ure 1 represents a side elevation of a rind in g-machine embodying our invention.

ig. 2 is a side elevation of the same w1th a portion of the frame broken away and with a part of the mechanism shown in sectional view; and Fig. 3 is a detached view of -theslid ing head which carries' the abrading-wheel, a

portion being shown in section.

Similar reference-figures refer to similar parts-'in the different views.

Our invention relates to a machine for surgrinding, and is specially adapted for grinding the sides of piston packing-rings and similar class of work in which it is desirable that both sides of the glround-work'shall be absolutelyparallel; an our invention consists in the construction and arran ement of arts, as hereinafter described, an set forth 1n the annexed claims.

Referring to the drawin stand or 'frame upon whic the operative parts of the mechanism are sup orted. 2 is a table upon whichthe work is supported, and 3 is a revolving abrading -'wheel held upon a horizontal shaft and driven from any I convenient counter-shaft by means of a belte construction and operation of so-called mag pulley 4.

The table 2 preferably consists of a mag-.

netic chuck, such as is now. in commonuse for holding work thereon by ma netic attraction, said chuck being energize by blades or brushes 5 6, suitably connected with a dynamo or other source of electricity. As the netic chucks is well understood by those conversant with this class of machinery, we have not considered it necessary to illustrate or describe its construction in detail.

The work-holding bed 2 is mounted upon the upperend of a rotating Shaft 7 ,which carries at the lower end a spur-gear 8 in mesh with a long-toothed pinion 9. on the lower end of a vertical shaft 10, which is driven by the Patented mi. 23, 1906.

' miter-gears 11 and 12 from a horizontal shaft 13, to one end of which is attached a disk 14 in contact with a friction drivin -wheel 15, carried by a sliding collar 16, having a spline connection with avertical shaft 17, operatively connected by bevel-gears 18 and 19 with a belt-pulley 20, journaled upon a stud 21 and driven by a belt connection from an The collar 16 1s convenient counter-shaft. provided with a groove 22, which is en aged y an arm 23 on a collar 24, capable of s idmg on the vertical rod 25 and being held in any desired vertical position by a set-screw 26. Bythe mechanism just described a-slow rotary movement is imparted to the work-holding bed 2 from the pulley 20, and the speed of the work-holding bed is varied by vertically adjusting the friction driving-wheel 15 on the shaft 17.

The vertical shaft 7 on which the workholding bed 2 issupported is ournaled at its upper and lower ends intwo sleeves 27 28,

which are provided with tapering outside sur-' faces and are held in oppositely-ta eredbearings in the frame 1 of the mac he I The lower end of the sleeve 27 and the upper end of the sleeve 28 are screw-threaded and carry nuts 29 and 30, bearing a ainst the frame of themachine, and provi ed with spanners, 1 denotes aholes or other means to effect their rotation to enable the conical sleeves to be driven into their conical bearings. 28 are cut apart at 31 32, so that the longitudinal movement of the sleeves as they are driven into their bearings by the nuts 29 and connection 35 with the upper .conical s eeve- 27 and being contained in the recessed ends of the sleeves 27 and 28 and capable of a lon- The sleeves 27 and- 30 will compress the sleeves against the shaft 7 and take up the wear in the journal-beargitudinal movement therein as actuated by a an adjusting-nut 36, which is held from longitudinal movement between the nuts 29 and 30. The'periphery of the nut 36 is graduated, as shown at'37, Fig. 1, to enable the rotary movement of the nut to be determined by an index-finger 38, attached to the frame 0 the machine. By the rotation of the nut 36 the screw threadedsleeveM may-be crowded against the shoulder 33 -to elevate the work-' holdingbed 2 and raise the work'toward the -abrading-wheeli3'. The abrading-whee'l' 3 isfv piournaled in a head .39 capable of. a sliding movementalongways 4'0 asactuatedb anad-F j us'tin g s'crew 41, provided with a hen -wheel 42. he ways 4 0v are: supported on a block- 43, pivoted at one; and upon .a stud {titothe [0 frame 1 of the machine and 'capable of being tilted on its pivotal stud 44 of an adj usting-screwf 45 and check-nuts lfiand? on opposite sides of a 'bracket48, projecting .fromthe side of the frame 1. 1

The adjusting device comprises the screw 45 and nuts 46-and 47, enabling the'block 43 to be tilted on the stud 44 te bringthewa' s 40,;along which the head 39 moves, par'allhl with the face of-the work-holdin bed 2.

' The operation of our improve grinding machin is as follows: The work 49 to be ground is laid upon" the work-holding bed 2,

' which forms part of an electrical magnet which may be energized through thebrushes 2 5 5 and 6 by means ofa switch 50, causing the work to be firmlj held against the surfaceof the bed 2. A s ow rotary movement is, im*

parted to the bed 2 bythe belt-pulle 20 and intermediatemechanism to rotate t e work- 49, and the abrading-wheel'rapidly driven by.

the beltulley- 4 is traversed across thesurface of t e work by means of the'screw 41 and hand-wheel 42 the block 43 having been J adjusted-bythe nuts 46 and 47 to bring the 3 5 path of the revolving abrading-wheel 3 parallel with the surface of the work-holding bed; 2. The work-holding bed 2 is yertically' 'adjusted .by the nut 36 and screw-threaded sleeve-34 to'bring the u .per sur'faceof the o work 49 into contact wit the surface of the abrading-Wheel- 3, and as the work is worn,

away by the actionof the wheel the work-L,

holding bed 2 is raised until the upper surface o f the work exactly-parallel,

ef t he work was-ii ;at states-"50 i j J L then thrown out and the work 49 turned over 45 6 en'able its opposite/side to be"'similarly 1 "ground, thereby ring-ingthe opposite sides i i QWhftwe cl asourinvent'iomand-dsire to-secureby Letters Patent,}is 0 1; Inagrinding-machinathe com ation witha sup orting-frame, of a revolving s ina dle journa edin said frame, a grinding-w eel carried by said spindle, means for traversin' I said wheel in a-linecoincident'with its o 5 5 i rotation, a rotatin spindle journa-led in said mm, a work-'hol m bed'sl pp tsd 0 t e end of said rotating spindle,''.' and means for adjusting the plane of the'a'iris of'said-grinding-whee spindlerelatively'to the plane of the-axis of saidworkr'supporting spindle". 1

- 2. ,In a grinding-machine, the combination with a revolving-grinding-wheel, of 'a spindle journaled bearings at right angles to the axis of said grinding-wheel, means for'rotatfing said spindle, a screw-threaded sleeve inclosin said spindle, a rotatingihub engaging 7 said s eeve and held from longitudinal move 'ment, whereby said spindle is moved in a line coincident with its axis. 7o

3. In a grinding-machine, the combination with a revolving grindin wheel, of a spindle journaled at an angle to t e axis of saidvgrind mg-Wheel, a work-holdin bed mounted on the upperend-of said s in le, a gear attached to-the ower end ofsai spindle,'a inion having teeth lon er than-the teeth 0 said gear, and jnterme iate mechanism between the a driving ower; and said pinion.

Date this filth-"day of April, 1904.

RALPH L. MORGAN.

JAMES Na Witnesses: v

' PENELOPE COMB RBAQH, RUwUs B.- Fownnm 

